CN114743825A - Isolating switch and method for monitoring on-off state of isolating switch - Google Patents
Isolating switch and method for monitoring on-off state of isolating switch Download PDFInfo
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- CN114743825A CN114743825A CN202210647856.2A CN202210647856A CN114743825A CN 114743825 A CN114743825 A CN 114743825A CN 202210647856 A CN202210647856 A CN 202210647856A CN 114743825 A CN114743825 A CN 114743825A
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- opening
- isolating switch
- closing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/02—Details
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F18/00—Pattern recognition
- G06F18/20—Analysing
- G06F18/22—Matching criteria, e.g. proximity measures
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/16—Indicators for switching condition, e.g. "on" or "off"
Abstract
The invention relates to the technical field of isolating switches, and provides an isolating switch and an isolating switch on-off state monitoring method, wherein the isolating switch comprises a base, an upright post, a moving contact, a static contact, an image acquisition device and a controller, the upright post is used for supporting the base, the moving contact and the static contact are both arranged on the base, the moving contact and the static contact are matched with each other to realize the on-off operation of the isolating switch, the image acquisition device is used for shooting a real-time on-off process image of the isolating switch at a preset frequency, and the controller is in communication connection with the image acquisition device, pre-stores a switch-on in-place image and a switch-off in-place image of the isolating switch, is used for comparing the similarity between the real-time on-off process image and the switch-on-place image and between the real-time on-off process image and the switch-off in-place image, and judges the on-off state of the isolating switch. The invention can automatically judge the opening and closing state of the isolating switch, thereby improving the reliability and the safety.
Description
Technical Field
The invention relates to the technical field of isolating switches, in particular to an isolating switch and a method for monitoring the opening and closing states of the isolating switch.
Background
The isolating switch is a switch device which is mainly used for isolating a power supply and switching over, communicating and cutting off a small current circuit and has no arc extinguishing function. When the isolating switch is in the separated position, the contacts have insulation distance meeting the specified requirements and obvious disconnection marks; a switching device capable of carrying current in normal loop conditions and current in abnormal conditions (e.g., short circuit) for a specified period of time when in the closed position.
At present, two means are mainly used for confirming the opening and closing positions of the isolating switch. One is to judge whether the disconnecting link is in place or not by manual visual inspection. The method depends on manual experience, operation and judgment errors are easy to occur, and the problems of low reliability and low safety exist. The other method is that after the disconnecting link rotates to the switching-on and switching-off position, the switching-on and switching-off state of the disconnecting link is confirmed by detecting the connection or disconnection of the auxiliary switch contact. The method determines the opening and closing state of the disconnecting link through the secondary loop, and the opening and closing state of the disconnecting link and the feedback result of the secondary loop cannot be guaranteed to be completely consistent because the position of the disconnecting link is not completely consistent with the measuring position, so that the problems of low reliability and low safety exist.
Therefore, it is necessary to develop a disconnecting switch and a method for monitoring the opening and closing states of the disconnecting switch, so as to better and effectively and accurately monitor the opening and closing states of the disconnecting switch, and further improve the reliability and safety of the disconnecting switch.
Disclosure of Invention
Based on the above, in order to solve the problems of low reliability and safety of the existing method for confirming the opening and closing state of the isolating switch, the invention provides the isolating switch and the method for monitoring the opening and closing state of the isolating switch, and the specific technical scheme is as follows:
an isolating switch comprises a base, an upright post, a moving contact and a fixed contact, wherein the upright post is used for supporting the base, the moving contact and the fixed contact are both arranged on the base, and the moving contact and the fixed contact are mutually matched to realize the opening and closing operation of the isolating switch; the isolating switch further comprises an image acquisition device and a controller.
The image acquisition device is used for shooting real-time opening and closing process images of the isolating switch at a preset frequency.
The controller is in communication connection with the image acquisition device, pre-stores a closing in-place image and an opening in-place image of the isolating switch, is used for comparing the similarity between the real-time opening and closing process image and the closing in-place image and the similarity between the real-time opening and closing process image and the opening in-place image, and judges the opening and closing state of the isolating switch according to the similarity.
The isolating switch can automatically judge the opening and closing state of the isolating switch by comparing the similarity between the real-time opening and closing process image and the closing in-place image and the similarity between the real-time opening and closing process image and the opening in-place image through the controller, does not depend on the experience of technicians to judge the opening and closing state of the isolating switch, does not need to set a secondary loop to detect and judge the opening and closing state of the isolating switch, and improves reliability and safety.
Furthermore, the image acquisition devices comprise a plurality of image acquisition devices, and the plurality of image acquisition devices are respectively used for shooting real-time opening and closing process images of the isolating switch at different angles at a preset frequency.
Further, the isolating switch further comprises:
and the driving device is arranged on the base and is in transmission connection with the moving contact, and is used for driving the moving contact to rotate around a rotating shaft arranged on the base so as to realize the opening and closing operation of the isolating switch.
Furthermore, the driving device drives the movable contact to rotate around the rotating shaft through the driving rod, and the controller is also used for driving the movable contact to rotate around the rotating shaft according to a formula
And calculating the displacement compensation amount of the driving rod and correcting the action parameters of the driving device according to the displacement compensation amount.
Wherein the content of the first and second substances,
indicating the original length of the drive rod,
which is indicative of the coefficient of expansion of the drive rod,
representing the reference temperature of the drive rod at its original length,
indicating the real-time temperature of the drive rod.
A method for monitoring the opening and closing state of an isolating switch comprises the following steps:
shooting a real-time opening and closing process image of the isolating switch at a preset frequency;
acquiring a closing in-place image and an opening in-place image of the isolating switch;
and comparing the similarity between the real-time opening and closing process image and the closing in-place image and the similarity between the real-time opening and closing process image and the opening in-place image, and judging the opening and closing state of the isolating switch according to the similarity.
Further, the specific method for comparing the similarity between the real-time opening and closing process image and the closing in-place image and the similarity between the real-time opening and closing process image and the opening in-place image and judging the opening and closing state of the isolating switch according to the similarity comprises the following steps:
after the real-time opening and closing process image, the closing in-place image and the opening in-place image are preprocessed, respectively extracting contour curves of the real-time opening and closing process image, the closing in-place image and the opening in-place image;
calculating a first similarity between the contour curve of the real-time opening and closing process image and the contour curve of the closing in-place image, and if the first similarity is greater than a first preset threshold value, judging that the isolating switch is in a closing state;
and calculating a second similarity between the contour curve of the real-time opening and closing process image and the contour curve of the opening in-place image, and if the second similarity is greater than a second preset threshold value, judging that the isolating switch is in an opening state.
Further, the specific method for shooting the real-time opening and closing process image of the isolating switch at the preset frequency comprises the following steps:
arranging a plurality of image acquisition devices;
and shooting real-time opening and closing process images of the isolating switch at different angles through a plurality of image acquisition devices respectively.
Further, the method for monitoring the opening and closing state of the isolating switch further comprises the following steps:
obtaining real-time temperature of drive rod
Original length, original length
Coefficient of expansion
And parameters at original lengthExamination temperature
；
According to the formula
Calculating the displacement compensation amount of the driving rod and correcting the action parameters of the driving device according to the displacement compensation amount;
the driving device drives the moving contact to rotate around a rotating shaft arranged on the base through the driving rod so as to realize the opening and closing operation of the isolating switch.
Further, the method for monitoring the opening and closing state of the isolating switch further comprises the following steps:
driving the moving contact to rotate according to the corrected action parameters of the driving device and judging the opening and closing states of the isolating switch;
if the isolating switch is not switched on in place, the moving contact is driven by the driving device to act until the isolating switch is switched on in place, and corresponding switching-on correction is recorded;
if the brake of the isolating switch is not in place, the moving contact is driven to act through the driving device until the isolating switch is in place when the brake is separated, and corresponding brake separation correction quantity is recorded;
and correcting the action parameters of the driving device according to the closing correction quantity and the opening correction quantity.
Drawings
The invention will be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the embodiments. Like reference numerals designate corresponding parts throughout the different views.
Fig. 1 is a schematic diagram of an overall structure of an isolation switch according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a partial structure of an isolating switch according to an embodiment of the present invention.
Description of reference numerals:
1. a base; 2. a column; 3. a moving contact; 4. static contact; 5. a controller; 6. a drive rod; 7. a rotating shaft.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to embodiments thereof. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The terms "first" and "second" used herein do not denote any particular order or quantity, but rather are used to distinguish one element from another.
As shown in fig. 1 and 2, an isolation switch in an embodiment of the present invention includes a base 1, an upright column 2, a movable contact 3, a fixed contact 4, an image acquisition device (not shown in the figure), and a controller 5, where the upright column 2 is used to support the base 1, the movable contact 3 and the fixed contact 4 are both installed on the base 1, and the movable contact 3 and the fixed contact 4 are matched with each other to implement a switching on and off operation of the isolation switch.
Specifically, a rotary shaft 7 is attached to the base 1. The moving contact 3 is rotatably connected with the rotating shaft 7. The movable contact 3 is configured to rotate around the rotating shaft 7 and to be close to or far away from the fixed contact 4 to realize the opening and closing operation of the isolating switch.
When the moving contact 3 is contacted with the static contact 4, the isolating switch is in a closing state; when the moving contact 3 is separated from the fixed contact 4 and the moving contact 3 moves to a preset position, the isolating switch is in an open state.
The preset position can be set according to actual conditions. For example, when the movable contact 3 rotates on a vertical plane around the rotating shaft 7, the position where the movable contact 3 rotates to be perpendicular to the base 1 or the position where the movable contact 3 is separated from the fixed contact 4 and the movable contact 3 rotates by a preset angle may be set as a preset position. When the moving contact 3 rotates on a horizontal plane around the rotating shaft 7, the position where the moving contact 3 is separated from the static contact 4 and rotates by a preset angle can be set as a preset position.
The image acquisition device is used for shooting real-time opening and closing process images of the isolating switch at a preset frequency. The image acquisition device comprises but is not limited to a high-definition camera.
The controller 5 is in communication connection with the image acquisition device, pre-stores a closing in-place image and a separating in-place image of the isolating switch, is used for comparing the similarity between the real-time opening and closing process image and the closing in-place image and the similarity between the real-time opening and closing process image and the separating in-place image, and judges the opening and closing state of the isolating switch according to the similarity.
Preferably, the image acquisition devices comprise a plurality of image acquisition devices, and the plurality of image acquisition devices are respectively used for shooting real-time opening and closing process images of the isolating switch at different angles at a preset frequency. Correspondingly, the closing in-place image and the opening in-place image respectively correspond to the real-time opening and closing process images of the isolating switch at different angles.
That is to say, the real-time opening and closing process image of the isolating switch at a certain angle corresponds to a closing in-place image and a opening in-place image.
When the similarity between the real-time opening and closing process images and the corresponding closing in-place images at different angles is larger than a first preset threshold value, judging that the disconnecting switch is in a closing state; and when the similarity between the real-time opening and closing process images and the corresponding opening in-place images at different angles is larger than a second preset threshold value, judging that the isolating switch is in an opening state.
Because the similarity between the real-time opening and closing process image and the closing in-place image of the isolating switch under a single angle and the similarity between the real-time opening and closing process image and the opening in-place image of the isolating switch under a single angle are compared, the opening and closing state of the isolating switch is further judged, and a judgment error possibly exists. That is to say, because the real-time opening and closing process image of the isolating switch may be acquired with errors due to the interference of shadows, light changes or other noises, the opening and closing state of the isolating switch is judged by respectively comparing the similarities between the real-time opening and closing process image of the isolating switch at a single angle and the closing in-place image and the opening in-place image, and a judgment error may exist, so that the opening and closing state of the isolating switch cannot be accurately judged.
Therefore, the real-time opening and closing process images of the isolating switch at different angles are shot by the image acquisition device at a preset frequency, the similarity between the real-time opening and closing process images and the opening in-place images of the isolating switch at different angles are compared, the opening and closing state of the isolating switch is further judged, the influence of shadow, light change or other noise interference on the accuracy of the judgment result can be eliminated as much as possible, and the opening and closing state of the isolating switch can be judged more accurately.
In summary, based on the fact that the image acquisition device acquires opening and closing real-time process images of the isolating switch at different angles, and compares the similarity between the real-time opening and closing process image and the closing in-place image and the similarity between the real-time opening and closing process image and the opening in-place image, the isolating switch can automatically judge the opening and closing state of the isolating switch, the opening and closing state of the isolating switch can be judged without depending on the experience of technicians, a secondary loop is not required to be set for detecting and judging the opening and closing state of the isolating switch, and reliability and safety are improved.
The expansion phenomenon often occurs when the solid is heated. This thermal expansion of the object results in a change in the length of the solid.
In particular, the length of the driving rod 6 varies due to temperature changes.
The driving device drives the moving contact 3 to rotate around the rotating shaft 7 through the driving rod 6, and when the temperature of the driving rod 6 changes, if the action parameters of the driving device are not adjusted, the problem that the moving contact 3 cannot be driven to act through the driving device so as to effectively realize the opening and closing operation of the isolating switch easily occurs.
To solve the above problem, in one embodiment, the isolation switch further comprises a driving device.
The driving device is installed on the base 1 and is in transmission connection with the moving contact 3, and is used for driving the moving contact 3 to rotate around a rotating shaft 7 installed on the base 1 so as to realize the opening and closing operation of the isolating switch.
Specifically, the driving device drives the movable contact 3 to rotate around the rotating shaft 7 through the driving rod 6. The driving device includes, but is not limited to, a telescopic feeding structure which is a telescopic rod or a motor driving a screw nut to rotate.
The telescopic direction of the driving device includes, but is not limited to, a vertical direction or a horizontal direction. Preferably, the driving rod 6 is made of a glass steel material.
The controller 5 is also used for calculating the formula
And calculating the displacement compensation amount of the driving rod 6 and correcting the action parameters of the driving device according to the displacement compensation amount.
Wherein the content of the first and second substances,
indicating the original length of the driving rod 6,
which represents the coefficient of expansion of the drive rod 6,
indicating the reference temperature of the driving rod 6 at its original length,
indicating the real time temperature of the drive rod 6. Different real-time temperatures correspond to different motion parameters.
By the formula
The displacement compensation quantity of the driving rod 6 is calculated, the action parameters of the driving device are corrected according to the displacement compensation quantity, the factor that the length of the driving rod 6 changes in a stretching mode due to temperature changes is taken into consideration, and the fact that the moving contact 3 is driven by the driving device to act can be guaranteed so that the disconnecting switch is effectively switched on and off.
In one embodiment, a method for monitoring the opening and closing state of an isolating switch comprises the following steps:
and S1, shooting the real-time opening and closing process image of the isolating switch at a preset frequency.
And S2, acquiring the in-place closing image and the in-place opening image of the isolating switch.
And S3, comparing the similarity between the real-time opening and closing process image and the closing in-place image and the similarity between the real-time opening and closing process image and the opening in-place image, and judging the opening and closing state of the isolating switch according to the similarity.
Specifically, in step S3, the specific method for comparing the similarity between the real-time opening and closing process image and the closing in-place image and the similarity between the real-time opening and closing process image and the opening in-place image, and determining the opening and closing state of the disconnecting switch according to the similarity includes the following steps:
and S30, after preprocessing the real-time opening and closing process image, the closing in-place image and the opening in-place image, respectively extracting contour curves of the real-time opening and closing process image, the closing in-place image and the opening in-place image.
The preprocessing includes but is not limited to denoising, enhancing, graying, binarization, and the like.
S31, calculating a first similarity between the contour curve of the real-time opening and closing process image and the contour curve of the closing in-place image, and if the first similarity is larger than a first preset threshold value, judging that the isolating switch is in a closing state.
S32, calculating a second similarity between the contour curve of the real-time opening and closing process image and the contour curve of the opening in-place image, and if the second similarity is larger than a second preset threshold value, judging that the isolating switch is in an opening state.
Since the first preset threshold and the second threshold can be adjusted and set according to actual conditions, and the contour curve extraction of the image belongs to conventional technical means in the field, further description is omitted here.
The method for monitoring the opening and closing state of the disconnecting switch is characterized in that opening and closing real-time process images of the disconnecting switch at different angles are acquired based on an image acquisition device, the similarity between the real-time opening and closing process images and the similarity between the real-time opening and closing in-place images and the similarity between the real-time opening and closing process images and the opening in-place images are compared, the opening and closing state of the disconnecting switch can be automatically judged, the opening and closing state of the disconnecting switch is judged without depending on experience of technicians, a secondary loop is not required to be set for detecting and judging the opening and closing state of the disconnecting switch, and reliability and safety are improved.
In one embodiment, in step S1, the specific method for capturing the real-time opening and closing process image of the disconnecting switch at the preset frequency includes the following steps:
and S10, setting a plurality of image acquisition devices.
And S11, shooting the real-time opening and closing process images of the isolating switch at different angles through the plurality of image acquisition devices respectively.
And the closing in-place image and the opening in-place image respectively correspond to the real-time opening and closing process images of the isolating switch at different angles. That is to say, the real-time opening and closing process image of the isolating switch at a certain angle corresponds to a closing in-place image and a opening in-place image.
When the similarity between the real-time opening and closing process images and the corresponding closing in-place images at different angles is larger than a first preset threshold value, judging that the isolating switch is in a closing state; and when the similarity between the real-time opening and closing process images and the corresponding opening in-place images at different angles is larger than a second preset threshold value, judging that the isolating switch is in an opening state.
The method comprises the steps of shooting real-time opening and closing process images of the isolating switch at different angles through the image acquisition device at a preset frequency, comparing the similarity between the real-time opening and closing process images and the opening and closing in-place images of the isolating switch at different angles, and further judging the opening and closing state of the isolating switch.
In one embodiment, the method for monitoring the opening and closing states of the disconnecting switch further comprises the following steps:
s4, acquiring the real-time temperature of the driving rod 6
Original length, original length
Coefficient of expansion
And a reference temperature at the original length
。
S5 according to the formula
The displacement compensation amount of the drive rod 6 is calculated and the action parameters of the drive device are corrected according to the displacement compensation amount.
The driving device drives the moving contact 3 to rotate around a rotating shaft 7 arranged on the base 1 through the driving rod 6 so as to realize the opening and closing operation of the isolating switch. When the driving device is a telescopic rod, the action parameter is the telescopic amount, and when the driving device is a telescopic feeding structure in which a motor drives a screw rod nut to rotate, the action parameter can be the number of rotation turns of the motor.
By the formula
The displacement compensation quantity of the driving rod 6 is calculated, the action parameters of the driving device are corrected according to the displacement compensation quantity, the factor that the length of the driving rod 6 changes in a stretching mode due to temperature changes is taken into consideration, and the fact that the moving contact 3 is driven by the driving device to act can be guaranteed so that the disconnecting switch is effectively switched on and off.
Due to the possibility of abrasion of the moving contact 3 and/or the fixed contact 4, a calculation error also exists in the displacement compensation amount of the driving rod 6, so that the moving contact 3 is driven to rotate according to the corrected action parameters of the driving device, and the opening and closing operation of the isolating switch cannot be realized hundreds of percent.
In order to solve the above problem, in one embodiment, the method for monitoring the opening/closing state of the disconnecting switch further includes the following steps:
and S6, driving the moving contact 3 to rotate according to the corrected action parameters of the driving device and judging the opening and closing state of the isolating switch.
And S7, if the isolating switch is not closed in place, the driving device drives the moving contact 3 to act until the isolating switch is closed in place, the variation of the closing action parameters of the corresponding driving device is recorded, and the variation of the closing action parameters is used as a closing correction quantity.
And S8, if the disconnecting switch is not in place, driving the moving contact 3 to act through the driving device until the disconnecting switch is in place, recording the variable quantity of the switching-off action parameter of the corresponding driving device, and taking the variable quantity of the switching-off action parameter as the switching-off correction quantity.
And S9, correcting the operation parameters of the driving device according to the closing correction amount and the opening correction amount.
According to the invention, the action parameters of the driving device are corrected according to the closing correction and the opening correction, and the factors of the abrasion of the contact and/or the static contact 4 and the calculation error of the displacement compensation of the driving rod 6 are taken into consideration, so that the opening and closing operation of the isolating switch can be more effectively realized.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is specific and detailed, but not to be understood as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. The utility model provides an isolator, includes base, stand, moving contact and static contact, the stand is used for supporting the base, moving contact and static contact are all installed on the base, moving contact and static contact mutually support in order to realize isolator's divide-shut brake operation, its characterized in that, isolator still includes:
the image acquisition device is used for shooting a real-time opening and closing process image of the isolating switch at a preset frequency;
and the controller is in communication connection with the image acquisition device, prestores a closing in-place image and a separating in-place image of the isolating switch, is used for comparing the similarity between the real-time opening and closing process image and the closing in-place image as well as between the real-time opening and closing process image and the separating in-place image, and judges the opening and closing state of the isolating switch according to the similarity.
2. The isolating switch according to claim 1, wherein the image capturing devices comprise a plurality of image capturing devices, and the plurality of image capturing devices are respectively used for capturing real-time opening and closing process images of the isolating switch at different angles at a preset frequency.
3. A disconnector according to claim 2, characterized in that the disconnector further comprises:
and the driving device is arranged on the base and is in transmission connection with the moving contact, and is used for driving the moving contact to rotate around a rotating shaft arranged on the base so as to realize the opening and closing operation of the isolating switch.
4. The isolating switch as claimed in claim 3, wherein the driving device drives the movable contact to rotate around the rotation axis via the driving rod, and the controller is further configured to calculate the formula
Calculating the displacement compensation amount of the driving rod and correcting the action parameters of the driving device according to the displacement compensation amount;
wherein the content of the first and second substances,
indicating the original length of the drive rod,
which is indicative of the coefficient of expansion of the drive rod,
representing the reference temperature of the drive rod at its original length,
representing the real time temperature of the drive rod.
5. A method for monitoring the opening and closing state of an isolating switch is applied to the isolating switch according to any one of claims 1 to 4, and is characterized by comprising the following steps:
shooting a real-time opening and closing process image of the isolating switch at a preset frequency;
acquiring a closing in-place image and an opening in-place image of the isolating switch;
and comparing the similarity between the real-time opening and closing process image and the closing in-place image and the similarity between the real-time opening and closing process image and the opening in-place image, and judging the opening and closing state of the isolating switch according to the similarity.
6. The method for monitoring the opening and closing state of the disconnecting switch according to claim 5, wherein the specific method for comparing the similarity between the real-time opening and closing process image and the closing in-place image and between the real-time opening and closing process image and the opening in-place image and judging the opening and closing state of the disconnecting switch according to the similarity comprises the following steps:
after the real-time opening and closing process image, the closing in-place image and the opening in-place image are preprocessed, respectively extracting contour curves of the real-time opening and closing process image, the closing in-place image and the opening in-place image;
calculating a first similarity between the contour curve of the real-time opening and closing process image and the contour curve of the closing in-place image, and if the first similarity is greater than a first preset threshold value, judging that the isolating switch is in a closing state;
and calculating a second similarity between the contour curve of the real-time opening and closing process image and the contour curve of the opening in-place image, and if the second similarity is greater than a second preset threshold value, judging that the isolating switch is in an opening state.
7. The method for monitoring the opening and closing state of the isolating switch according to claim 5, wherein the specific method for shooting the real-time opening and closing process image of the isolating switch at the preset frequency comprises the following steps:
a plurality of image acquisition devices are arranged;
and shooting real-time opening and closing process images of the isolating switch at different angles through a plurality of image acquisition devices respectively.
8. The method for monitoring the opening and closing state of the disconnecting switch according to claim 6, further comprising the steps of:
obtaining real-time temperature of drive rod
Original length, original length
Coefficient of expansion
And a reference temperature at the original length
；
According to the formula
Calculating displacement compensation amount of driving rod and correcting driving device according to the displacement compensation amountThe motion parameters of (1);
the driving device drives the moving contact to rotate around a rotating shaft arranged on the base through the driving rod so as to realize the opening and closing operation of the isolating switch.
9. The method for monitoring the opening and closing state of the disconnecting switch according to claim 7, further comprising the following steps:
driving the moving contact to rotate according to the corrected action parameters of the driving device and judging the opening and closing states of the isolating switch;
if the isolating switch is not switched on in place, the moving contact is driven by the driving device to act until the isolating switch is switched on in place, and corresponding switching-on correction is recorded;
if the brake of the isolating switch is not in place, the moving contact is driven to act through the driving device until the isolating switch is in place when the brake is separated, and corresponding brake separation correction quantity is recorded;
and correcting the action parameters of the driving device according to the closing correction quantity and the opening correction quantity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210647856.2A CN114743825A (en) | 2022-06-09 | 2022-06-09 | Isolating switch and method for monitoring on-off state of isolating switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210647856.2A CN114743825A (en) | 2022-06-09 | 2022-06-09 | Isolating switch and method for monitoring on-off state of isolating switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114743825A true CN114743825A (en) | 2022-07-12 |
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